#include "config.h"
#include "WebFontImpl.h"
#include "Font.h"
#include "FontCache.h"
#include "FontDescription.h"
#include "GraphicsContext.h"
#include "painting/GraphicsContextBuilder.h"
#include "TextRun.h"
#include "platform/WebFloatPoint.h"
#include "platform/WebFloatRect.h"
#include "WebFontDescription.h"
#include "platform/WebRect.h"
#include "WebTextRun.h"
#include <skia/ext/platform_canvas.h>
using namespace WebCore;
namespace WebKit {
WebFont* WebFont::create(const WebFontDescription& desc)
{
return new WebFontImpl(desc, desc.letterSpacing, desc.wordSpacing);
}
WebFontImpl::WebFontImpl(const FontDescription& desc, short letterSpacing, short wordSpacing)
: m_font(desc, letterSpacing, wordSpacing)
{
m_font.update(0);
}
WebFontDescription WebFontImpl::fontDescription() const
{
return WebFontDescription(m_font.fontDescription(), m_font.letterSpacing(), m_font.wordSpacing());
}
int WebFontImpl::ascent() const
{
return m_font.fontMetrics().ascent();
}
int WebFontImpl::descent() const
{
return m_font.fontMetrics().descent();
}
int WebFontImpl::height() const
{
return m_font.fontMetrics().height();
}
int WebFontImpl::lineSpacing() const
{
return m_font.fontMetrics().lineSpacing();
}
float WebFontImpl::xHeight() const
{
return m_font.fontMetrics().xHeight();
}
void WebFontImpl::drawText(WebCanvas* canvas, const WebTextRun& run, const WebFloatPoint& leftBaseline,
WebColor color, const WebRect& clip, bool canvasIsOpaque,
int from, int to) const
{
FontCachePurgePreventer fontCachePurgePreventer;
GraphicsContextBuilder builder(canvas);
GraphicsContext& gc = builder.context();
#if WEBKIT_USING_SKIA
gc.platformContext()->setDrawingToImageBuffer(!canvasIsOpaque);
#elif WEBKIT_USING_CG
#endif
gc.save();
gc.setFillColor(color, ColorSpaceDeviceRGB);
gc.clip(WebCore::FloatRect(clip));
m_font.drawText(&gc, run, leftBaseline, from, to);
gc.restore();
#if defined(WIN32)
if (canvasIsOpaque && SkColorGetA(color) == 0xFF && !canvas->isDrawingToLayer()) {
const SkBitmap& bitmap = canvas->getTopDevice()->accessBitmap(true);
IntRect textBounds = estimateTextBounds(run, leftBaseline);
IntRect destRect = gc.getCTM().mapRect(textBounds);
destRect.intersect(IntRect(0, 0, bitmap.width(), bitmap.height()));
for (int y = destRect.y(), maxY = destRect.maxY(); y < maxY; y++) {
uint32_t* row = bitmap.getAddr32(0, y);
for (int x = destRect.x(), maxX = destRect.maxX(); x < maxX; x++)
row[x] |= (0xFF << SK_A32_SHIFT);
}
}
#endif
}
int WebFontImpl::calculateWidth(const WebTextRun& run) const
{
FontCachePurgePreventer fontCachePurgePreventer;
return m_font.width(run, 0);
}
int WebFontImpl::offsetForPosition(const WebTextRun& run, float position) const
{
FontCachePurgePreventer fontCachePurgePreventer;
return m_font.offsetForPosition(run, position, true);
}
WebFloatRect WebFontImpl::selectionRectForText(const WebTextRun& run, const WebFloatPoint& leftBaseline, int height, int from, int to) const
{
FontCachePurgePreventer fontCachePurgePreventer;
return m_font.selectionRectForText(run, leftBaseline, height, from, to);
}
WebRect WebFontImpl::estimateTextBounds(const WebTextRun& run, const WebFloatPoint& leftBaseline) const
{
FontCachePurgePreventer fontCachePurgePreventer;
int totalWidth = m_font.width(run, 0);
const FontMetrics& fontMetrics = m_font.fontMetrics();
return WebRect(leftBaseline.x - (fontMetrics.ascent() + fontMetrics.descent()) / 2,
leftBaseline.y - fontMetrics.ascent() - fontMetrics.lineGap(),
totalWidth + fontMetrics.ascent() + fontMetrics.descent(),
fontMetrics.lineSpacing());
}
}